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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $79,715 | 5,010 | 11,417 |
| 2006 | $175,599 | 11,037 | 25,149 |
| 2007 | $347,602 | 172,927 | 52,604 |
| 2008 | $355,699 | 17,207 | 450,833 |
| 2009 | $110,544 | 4,555 | 419,740 |
| 2010 | $129,390 | 130,555 | 229,838 |
| 2011 | $64,537 | 55,773 | 6,431 |
Note: Quantity represents Number of pairs
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